RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River DS Lt Ouse

Largest measured ruffe: 15.3 cm

The largest ruffe measured in Environment Agency surveys of the River DS Lt Ouse was 15.3 cm, recorded at Wilton Bridge on 22 June 1990.

Across 455 measured ruffe, the median measured length was 7.8 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River DS Lt Ouse.

See ruffe records across England →

Most recent observation23 May 2012Plantation Farm · 3 fish
Largest measured ruffe
15.3 cm
Median length
7.8 cm
Fish measured
455
Survey locations
10

Individual EA measurements

Largest measured ruffe

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
15.3 cm22 Jun 1990Wilton Bridge29863
14.3 cm20 Jun 1990Hockwold Common29862
13.8 cm19 Apr 1989Brandon Staunch29850
13.8 cm19 Apr 1989Brandon Staunch29850
13.8 cm19 Apr 1989Brandon Staunch29850
13.3 cm23 Apr 1993Hockwold Common29870
13.3 cm23 Apr 1993Hockwold Common29870
12.8 cm12 May 1993Plantation Farm29874
12.8 cm11 May 1993Brandon Staunch29869
12.8 cm19 Jun 1990Brandon Staunch29861

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where ruffe were found

Each point marks a survey location with at least one ruffe record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding ruffe
Plantation Farm15 May 198923 May 20124
Brandon Creek17 May 198914 Jun 20004
Little Ouse Village10 May 198913 Jun 20004
Blackdyke Farm Little Ouse26 Jun 199012 Jun 20003
Hockwold Common15 May 19895 Jun 20004
Brandon Staunch19 Apr 198923 May 20004
Wilton Bridge22 Jun 199018 May 19932
Brandon Fen17 May 19896 May 19933
Cowles Drove17 May 198917 May 19891
Orchard House12 May 198912 May 19891

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1989–2012

Survey records by year

Each bar shows how many survey visits recorded ruffe that year.

Fish measured by surveyors

Measured length distribution

See how the 455 measured fish were spread across different length ranges.

Smallest
4.8 cm
Lower quarter
6.8 cm
Median
7.8 cm
Upper quarter
8.8 cm
Largest
15.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River DS Lt Ouse

Compare other species with enough survey and measurement data for a detailed page.

Pike Roach Perch European eel Silver bream Dace

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →